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TEST REPORT
Professional DVB-T2 Signal Meter
How to Make
a Professional Meter even Better
The DS2400T from Deviser
is one of the most exemplary
meters for terrestrial signals, and our in-depth test
report in TELE-audiovision
09-10/2012 had nothing but
praise for this handheld meter. It was and still is a perfect tool for checking DVB-T
signals – but not for DVB-T2!
The updated model has
changed all that: It is now
fully compatible with DVB-T2
and we gave it a try in our
Vienna test center. Live DVBT2 signals are readily available at that TELE-audiovision
test center, which is all the
more reason to look at the
changes of the DS2400T –
even though you wouldn’t
note an outside difference
from the model it replaces.
No surprises there, since
both the shape and the low
weight of the meter have received accolades from hundreds of professional installers in the past.
The situation changes,
however, when we look behind its first appearance:
The DVB-T/DVB-C tuner that
had been used before was
replaced with a next-generation tuner for DVB-T, DVB-T2
and DVB-C. This goes hand
in hand with an extension
of the receivable frequency
range that now goes from 5
to 1052 MHz rather than to
1000 MHz as before.
Even though the previously used TFT display sported
perfect readability, Deviser
has now opted for an OLED
display for its new model –
offering the same resolution
with 320 x 240 pixels. The
new display generates less
heat and offers even better
colours.
The voltage of the built-in
battery pack was increased
from 11.1V to 12.6V, which
was a technical change required for the new tuner and
display. In return for this
slightly increased voltage
battery life was reduced by
half an hour and now covers 4.5 hours of continuous
operation. But make no mistake about it, 4.5 hours is
still an excellent result and
you’ll hardly notice the missing 30 minutes in real life.
DVB-T2 is gaining momentum all the time. Several countries have already
adopted DVB-T2 as their terrestrial standard, and many
other regions still using DVBT are working on the transition to DVB-T2. One thing
is for sure: Sooner or later
DVB-T2 will become the default terrestrial transmission
standard and – obviously
– installers will have to upgrade their equipment as
well. The DS2400T from Deviser comes into play quite
nicely at this stage.
Not much has changed
as far as functions and options are concerned, which
means the results of our test
report in TELE-audiovision
09-10/2012 are still valid.
The software used for the
DS2400T has also remained
the same, except that it now
offers all DVB-T2 functions
as well. So this test report
only looks at the new DVBT2 features.
We have come to expect
from Deviser that its meters are a perfect match
for measuring all terrestrial
DVB signals and once again
the model at hand lives up
to those promises: All active
DVB-T and DVB-T2 frequencies were detected, locked in
and measured. It only took a
few seconds for the DS2400T
to display the signal level,
01-02/2014
Deviser DS2400T
Perfectly equipped to measure
all terrestrial DVB standards
www.TELE-audiovision.com/14/01/deviser
74 TELE-audiovision International — The World‘s Largest Digital TV Trade Magazine — 01-02/2014 — www.TELE-audiovision.com
MER, as well as CBER and
LBER (VBER) values. All other relevant functions such as
BER measurements or constellation diagrams are now
available for DVB-T2 as well.
It was by chance that we
detected a very weak DVBT2 frequency during our
test, with a signal that was
hardly noticeable at all –

3.
even though our large outside antenna
maxes out on reception as far as possible. A look at the constellation diagram
for this frequency looked like a shot in
the dark: dots without a clear focus and
lying far apart in different squares. No
wonder we could hardly achieve reception. The DS2400T, however, helped us
optimise our antenna’s alignment so
that the signal quality could be slightly
improved. Nonetheless, the overall signal was too weak for reliable and interference-free reception.
The new DS2400T from Deviser with
its DVB-T2 compatibility is absolutely fit
for future use and ready for DVB-T2 reception, which will be rolled out in many
countries in the near future.
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More about this company
■ We presented the DS2400T professional meter in TELE-satellite
www.TELE-audiovision.com/TELE-audiovision-1307/eng/deviser.pdf
09-10/2012. The new version of this meter now also supports
DVB-T2 signals. All remaining features and functions remained
untouched and are dealt with in our previous test report:
www.tele-audiovision.com/TELE-satellite-1209/eng/deviser.pdf
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76 TELE-audiovision International — The World‘s Largest Digital TV Trade Magazine — 01-02/2014 — www.TELE-audiovision.com
1. Main menu of the DS2400T from Deviser.
2. Signal measurement in DVB-T2 mode.
3. Frequency selection for signal
measurement in DVB-T2 mode.
4. DVB-T2 also brings the 256-QAM
modulation to this meter.
5. Measuring a very weak signal: The
constellation diagram clearly demonstrates
the low quality of the incoming signal.
6. This is what the constellation diagram
looks like for a strong signal.
7. Meter setting in the Toolbox software.
8. Channel editor of the Toolbox software.
www.TELE-audiovision.com — 01-02/2014 — TELE-audiovision International — 全球发行量最大的数字电视杂志
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